Highly Luminescent MOF and Its in Situ Fabricated Sustainable Corn Starch Gel Composite as a Fluoro-Switchable Reversible Sensor Triggered by Antibiotics and Oxo-Anions
antibiotic and oxo-anions sensing; corn starch gel composite; DFT investigation; reversible fluoro-switching; roxarsone
Frequent use of antibiotics and the growth of industry lead to the pollution of several natural resources which is one of the major consequences for fatality to human health. Exploration of smart sensing materials is highly anticipated for ultrasensitive detection of those hazardous organics. The robust porous hydrogen bonded network encompassing a free-NH2 moiety, Zn(II)-based metal-organic framework (MOF) (1), is used for the selective detection of antibiotics and toxic oxo-anions at the ppb level. The framework is able to detect the electronically dissimilar antibiotic sulfadiazine and nitrofurazone via fluorescence "turn-on"and "turn-off"processes, respectively. The antibiotic-triggered reversible fluoro-switching phenomena (fluorescence "on-off-on") are also observed by using the fluorimetric method. An extensive theoretical investigation was performed to establish the fluoro-switching response of 1, triggered by a class of antibiotics and also the sensing of oxo-anions. This investigation reveals that the interchange of the HOMO-LUMO energy levels of fluorophore and analytes is responsible for such a fluoro-switchable sensing activity. Sensor 1 showed the versatile detection ability which is reflected by the detection of a carcinogenic nitro-group-containing drug "roxarsone". In view of the sustainable environment along with quick-responsive merit of 1, an in situ MOF gel composite (1@CS; CS = corn starch) is prepared using 1 and CS due to its useful potential features such as biocompatibility, toxicologically innocuous, good flexibility, and low commercial price. The MOF composite exhibited visual detection of the above analytes as well as antibiotic-triggered reversible fluoro-switchable colorimetric "on-off-on"response. Therefore, 1@CS represents a promising smart sensing material for monitoring of the antibiotics and oxo-anions, particularly appropriate for the real-field analysis of carcinogenic drug molecule "roxarsone"in food specimens. 2022 American Chemical Society.
Kanzariya D.B.; Goswami R.; Muthukumar D.; Pillai R.S.; Pal T.K.
ACS Applied Materials and Interfaces, Vol-14, No. 43, pp. 48658-48674.
https://doi.org/10.1021/acsami.2c13571 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85140829409&doi=10.1021%2facsami.2c13571&partnerID=40&md5=39d98b62c6cfe60adbdac9324c46824a
Kanzariya D.B., Department of Chemistry, Pandit Deendayal Energy University, Gujarat, Gandhinagar, 382426, India; Goswami R., Inorganic Materials and Catalysis Division, CSIR, Central Salt and Marine Chemicals Research Institute, Gujarat, Bhavnagar, 364002, India, Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India, Department of Applied Chemistry and Environmental Science, School of Science, RMIT University, Melbourne, 3001, VIC, Australia; Muthukumar D., Department of Chemistry, Christ University, Karnataka, Bangalore, 560029, India; Pillai R.S., Department of Chemistry, Christ University, Karnataka, Bangalore, 560029, India; Pal T.K., Department of Chemistry, Pandit Deendayal Energy University, Gujarat, Gandhinagar, 382426, India